Very strange image issue on 27" 5k

Discussion in 'iMac' started by creativedogmedia, Mar 19, 2016.

  1. creativedogmedia macrumors 65816


    Jun 26, 2011
    i got a new 27" iMac 5k on thursday...i moved all of my data over. I shoot in RAW format which produces DNG files to work with in Lightroom and Photoshop.

    On my new iMac, every preview image (after hitting the spacebar) has a line or a square of a lighter section through it. To clarify, this is not via the actual Preview's what happens when you hit the spacebar while on an image.

    If I move the image to my Dell external monitor right beside it the issue goes away. I pulled up the same files on my Macbook Pro (where they were) and no issue there either. Opening the image up in Lightroom is issues with the actual image. Here is a screenshot from my iMac and same image after being moved to my Dell monitor.

    What in the world?

    Attached Files:

  2. cyclingplatypus macrumors 65816


    Mar 15, 2007
    That's bizarre. I shoot Nikon and their RAW is NEF but I am unable to recreate what you have. Hoping we can help you find out what it is without a trip to the Genius Bar.
  3. tdbrown75 macrumors member


    Apr 28, 2015
    Dallas, TX
    I had weird issues with mine, have you trued any video? Here's my thread, ended up being a bad logic board.


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